Tread surface and periphery of a footwear unit sole



FIG. 1 is a bottom plan view of a tread surface and periphery of afootwear unit sole showing our new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a front elevational view; and,

FIG. 5 is a rear elevational view.

The broken line showing of a shoe upper in FIGS. 2-5 is for illustrativepurposes only and forms no part of the claimed design.

The ornamental design for a tread surface and periphery of a footwearunit sole, as shown and described.